From owner-freebsd-hardware@FreeBSD.ORG Fri Nov 7 08:34:42 2008 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 01B00106567C for ; Fri, 7 Nov 2008 08:34:42 +0000 (UTC) (envelope-from artemb@gmail.com) Received: from fk-out-0910.google.com (fk-out-0910.google.com [209.85.128.187]) by mx1.freebsd.org (Postfix) with ESMTP id 820038FC0C for ; Fri, 7 Nov 2008 08:34:41 +0000 (UTC) (envelope-from artemb@gmail.com) Received: by fk-out-0910.google.com with SMTP id k31so1311356fkk.11 for ; Fri, 07 Nov 2008 00:34:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender :to:subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references :x-google-sender-auth; bh=WDFUDrmdiLCRcEnUBwT4t4ynSqTMbKdbWIEzyEGVqXM=; b=TGbIYR40fwclcJIsPqaxkbfCubmUDm8tFKjn6gPkuv4nqMSvv504vF8VOxKgB/afWM mkB22v0yXkpEs9PEvqlpUD0Hnhd8evDfNwjdM2C8luIBjZkempW9ahmtkNHVUDfi2QAH 71+J4Szh0DKsDGTiAbxk7OM2gGggXRHnckI4E= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=K04UEZCS8VK94O+bDycBUU3taTRKfxBKuZFXo9eJEX2x01yzrB9V+05uCRHqSyV3fc Z+xJZv5yJZIQcyKbe1ComRswFICUm/RR8sS9iZOl3WlC9XRXwdOho0uU7vol5fHj99OS ytj2o62SjKB2iaKmr5boKCBcplXlUyIO/JVkc= Received: by 10.180.214.13 with SMTP id m13mr950320bkg.157.1226045281672; Fri, 07 Nov 2008 00:08:01 -0800 (PST) Received: by 10.180.217.13 with HTTP; Fri, 7 Nov 2008 00:08:01 -0800 (PST) Message-ID: Date: Fri, 7 Nov 2008 00:08:01 -0800 From: "Artem Belevich" Sender: artemb@gmail.com To: "Jeremy Chadwick" In-Reply-To: <20081107071752.GA5842@icarus.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20081107071752.GA5842@icarus.home.lan> X-Google-Sender-Auth: 65941cd0326b6f42 Cc: votdev@gmx.de, sos@freebsd.org, freebsd-stable@freebsd.org, freebsd-hardware@freebsd.org Subject: Re: Western Digital hard disks and ATA timeouts X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Nov 2008 08:34:42 -0000 > Note that Western Digital's "RAID edition" drives claim to take up to 7 > seconds to reallocate sectors, using something they call TLER, which > force-limits the amount of time the drive can spend reallocating. TLER > cannot be disabled: TLER can be enabled/disabled on recent WD drives (SE16/RE2/GP). SE16/GP come with TLER off, RE2 with TLER on. Google WDTLER utility. It can apparently be obtained from WD by asking them nicely. Or, yet again, google is your friend. Here's one example - http://www.hardforum.com/archive/index.php/t-1191548.html --Artem